Age : 22 Join date : 2013-01-02 Posts : 356 Forum Rep : 0
Subject: speed calculation Sun May 12, 2013 9:24 pm
Speed Calculation Sheet
Engine RPM: Gear Ratio: Tire Size (Rear):
Wheel Circumference - Wheel Diameter X 3.14=
Circumference In Feet - wheel circumference /12=
Wheel RPM - Engine RPM / Gear Ratio =
Feet / Min. - Wheel Circumference(ft) X wheel rpm =
Feet / Hr. - feet per min X 60=
Miles / Hr. - /5,280 = mph
Last edited by motorizedeverything on Thu Jul 18, 2013 8:33 am; edited 3 times in total
Doc Sprocket Administrator
Age : 47 Join date : 2013-04-21 Posts : 2911 Forum Rep : 20 Location : Ontario Canada
Subject: Re: speed calculation Sun May 12, 2013 11:37 pm
Thank you for posting this. Also, if this forum is capable of hosting the file and if anybody is interested, I have a Excel based spreadsheet file that does the calcs for you. You just plug in the variables like sprocket and wheel sizes, RPM etc, and it spits out the answers.
Thank you for posting this. Also, if this forum is capable of hosting the file and if anybody is interested, I have a Excel based spreadsheet file that does the calcs for you. You just plug in the variables like sprocket and wheel sizes, RPM etc, and it spits out the answers.
If you upload the spreadsheet onto a file hosting site and give me the download link, I can post it as a note on the Facebook page. All credit will go to you, of course.
Subject: speed calculation 
Sun May 12, 2013 9:24 pm
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